低溶解氧条件下不同内回流比对A^2/O工艺运行的影响  

Effect of Function in A^2/O Bioreactor with Different Inner Sludge Recycling Ratio under Low Dissolve Oxygen

作　　者：吴波 于咏梅 Wu Bo;Yu Yongmei(Henan Yellow River Hydrological Survey and Design Institute,Zhengzhou 450004,China)

机构地区：[1]河南黄河水文勘测设计院,河南郑州450004

出　　处：《广东化工》2020年第17期110-111,127,共3页Guangdong Chemical Industry

摘　　要：本文采用A^2/O反应器,在低溶解氧条件下,通过控制不同的内回流比来设定三种工况,对各工况的出水水质进行分析比较。低DO条件下污泥仍然保持着的较高的硝化性能,使氨氮出水达到一级A排放标准。适度降低曝气量和溶解氧对废水COD和氨氮的去除影响不大,说明污水处理厂存在曝气过多和电量浪费现象。好氧池没有出现稳定的反硝化现象,曝气池通过SND过程脱氮占总氮去除量的比重很小,SND现象非常微弱。Through analyzing the effluent quality of three conditions with different inner sludge recycling ratio under low dissolved oxygen concentration in A2/O bioreactor, obtaining the conclusion that the ability of nitration kept good under low dissolved oxygen concentration and the NH4+-N could meet the Level 1-A Standard completely. The effect of removing COD and NH4+-N were not changed obviously, which indicated too much aeration in the sewage treatment plant leading to the waste of energy. The phenomenon of Simultaneous Nitrification and Denitrification was indefinite in the experiment.

关 键 词：A^2/O 溶解氧 内回流比 SND 

分 类 号：TQ[化学工程]